谁能告诉我Obj-C类接口中的尖括号"<...>"有什么用呢？像这样... http://snipt.net/robhawkes/cocoa-class-interface
@interface MapMeViewController : UIViewController <CLLocationManagerDelegate,
MKReverseGeocoderDelegate, MKMapViewDelegate, UIAlertViewDelegate> { ... }
从我的观点它们看起来像某种类型声明的(考虑到我以前在PHP和JavaScript的经验),就像我们要确保MapMeViewController是CLLocationManagerDelegate,MKReverseGeocoderDelegate,MKMapViewDelegate,或UIAlertViewDelegate
有关@interface语法的文档似乎没有提到这一点.